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EP1930111A1 - Wirbelkopf und seine Anwendung - Google Patents

Wirbelkopf und seine Anwendung Download PDF

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Publication number
EP1930111A1
EP1930111A1 EP06125304A EP06125304A EP1930111A1 EP 1930111 A1 EP1930111 A1 EP 1930111A1 EP 06125304 A EP06125304 A EP 06125304A EP 06125304 A EP06125304 A EP 06125304A EP 1930111 A1 EP1930111 A1 EP 1930111A1
Authority
EP
European Patent Office
Prior art keywords
spindle
head
whirling
cutter
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06125304A
Other languages
English (en)
French (fr)
Inventor
Gael Vouillamoz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Willemin-Macodel SA
Willemin Macodel SA
Original Assignee
Willemin-Macodel SA
Willemin Macodel SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Willemin-Macodel SA, Willemin Macodel SA filed Critical Willemin-Macodel SA
Priority to EP06125304A priority Critical patent/EP1930111A1/de
Priority to US11/998,205 priority patent/US20080131224A1/en
Publication of EP1930111A1 publication Critical patent/EP1930111A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/32—Thread cutting; Automatic machines specially designed therefor by milling
    • B23G1/34—Thread cutting; Automatic machines specially designed therefor by milling with a cutting bit moving in a closed path arranged eccentrically with respect to the axis of the rotating workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/18—Milling cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/043—Accessories for spindle drives
    • B23Q5/046—Offset spindle drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/50—Cutting inserts
    • B23C2210/503—Cutting inserts mounted internally on the cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2220/00—Details of milling processes
    • B23C2220/68—Whirling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G2240/00—Details of equipment for threading other than threading tools, details of the threading process
    • B23G2240/60—Thread whirling, i.e. production of a thread by means of an annular tool rotating about an axis not coincident with the axis of the thread being produced
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5104—Type of machine
    • Y10T29/5109—Lathe
    • Y10T29/5114—Lathe and tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/300056—Thread or helix generating
    • Y10T409/30056—Thread or helix generating with planetary cutter

Definitions

  • the present invention relates to a whirling head comprising a milling cutter, mounted in a frame arranged to be fixed to the body of a spindle in an automatic machining center, so that the driving shaft of the spindle drives the said milling cutter during a whirling operation integrated into a work cycle of said center. It also relates to the use of such a whirling head on the spindle of a five-axis machining center.
  • the object of the present invention is to rationalize and improve, in terms of efficiency, the manufacture by machining of certain objects of the medical field, more specifically of certain categories of bone screws.
  • Bone screws are objects of common use in surgery.
  • the structures of the different types of such screws are now standardized and their manufacture is subject to precise constraints. It is known, in particular, that the quality requirements required for the threading of the rods of the screws lead to the use of the whirling technique, ie the cutting of the threads by means of internal teeth mills arranged eccentrically and with their axis oblique with respect to the axis of the stem.
  • the structures of the screw heads are also standardized and require complex milling operations in a complicated geometry to ensure a secure coupling with the screw bit at the time of installation.
  • the present invention proposes a solution to this difficulty. It enables the manufacture of standard long-bone screws on the bar at a conventional five-axis machining center, in a single cycle of programmed operations, succeeding one another automatically. The production times therefore reach minimum values.
  • the invention provides a whirl head according to claim 1 and a use of said whirl head according to claim 6.
  • Advantageous embodiments are defined by claims 2 to 5 and 7.
  • FIG. 1 shows the main elements of the swirl head given as an example.
  • An internal milling cutter 1 provided with plates 2 is fixed and centered by screws 3 against the rear face of a tubular support with an inner cone 4 which rotates in rolling bearings 5, for example made of ceramic.
  • the fixed outer races of the bearings 5 are housed in a socket-shaped portion 6 of a metal casing 7 forming the main part of the frame of the whirling head.
  • the end of the cone 4 carries a hollow pulley 8 provided with teeth 9 and having a tubular portion which covers the sleeve-shaped portion 6 of the envelope 7.
  • the part 7 forms a circular receptacle 10 limited by the outer side wall of the part.
  • a cylindrical piece 12 acting as hub, retained by screws 13, and whose outer surface carries rolling bearings 14 supporting and guiding a second hollow pulley 15 externally provided with teeth 16.
  • This hollow pulley 15 is secured on its outer side, a bottom 17 constituting a coupling member.
  • the casing 7 is closed on the side of the cone 4 and the coupling member 17 by a flat cover 18 provided with openings for the passage of the projections of the rotating bodies 8, 4, 1 on the one hand and 17, 15 on the other hand.
  • These rotary members are supported with their parallel axes in the casing 7.
  • the removal of the cover 18 allows the establishment of a toothed belt 19 on the pulleys which ensures the drive of the cutter 1 from the member 17 .
  • the Fig. 2 shows the internal milling cutter 1 with six triangular plates 2 engaged in housings of the rear face of the milling cutter. We see that for each plate, one of its vertices is prominent in the central bore so to cut the bar to thread as will be seen later. Another vertex protrudes in a radial clearance 2a of the cutter, and the third vertex is engaged in an elongate recess 2b formed in the rear face of the cutter.
  • the rear face of the cutter comprises six cylindrical housings 3a in which the heads of the screws 3 are housed.
  • the lateral face thereof comprises a series of grooves 20 in the form of a labyrinth, cooperating with a ring 21 ( Fig. 1 ) attached to the casing 7 and surrounding the cutter.
  • the whirl head is shown in FIG. Fig. 3 attached to the body 25 of a spindle 26.
  • a calibrated opening 23 constitutes an indexing means cooperating very precisely with a corresponding indexing means 24, 24a fixed to the body 25 of the spindle 26.
  • the coupling member 17, with its slightly conical outer face tubular projection (according to HSK standard E40) and its bore having an inner groove engages and binds to the spindle drive shaft so that that the complementary indexing means 23, 24, 24a perfectly complement the isostatic mounting of the member 17 on the spindle while ensuring its drive.
  • the Fig. 4 shows how, with the described head fixed to the spindle 26, a swirling operation is carried out on a rod 27 coming from a bar of material to be machined, driven in rotation and guided by a doll 28.
  • the rod 27 is supported at its front end by a tailstock 29.
  • the axis of rotation of the spindle 26 is inclined to that of the bar 27 by an angle corresponding to the angle of rise of the thread to be cut by the internal gear mill 1.
  • this spindle is deported. laterally so as to fix the eccentric position of the cutter 1 with respect to the Bar 27.
  • the diameter of the net is determined by this eccentricity of the swirling crown, therefore by the distance between the centers of the bar and the milling cutter.
  • the cutter rotates at high speed around the threading bar. This is itself animated by a slow rotation synchronized with the axial advance of the tool which allows to define the pitch of the net.
  • the portion of the whirl head shown in section at the Fig. 4 shows how the described compact construction allows the driving of the mill 1 by the toothed belt 19 with a minimum space ensuring the rigidity and accuracy of positioning, which ensures a high-quality manufacturing of bone screws.
  • the rigid base 30 carries, on a bracket 31 which is rigidly connected thereto, the bar advance axis 28 already shown in FIG. Fig. 4 .
  • This axis defines the X direction.
  • the console 31 defines a horizontal plane parallel to the X axis. It guides an element 32 called a rear recovery unit capable of sliding in the X direction over a reduced stroke (U axis).
  • This unit 32 can also rotate about a horizontal axis perpendicular to X (Y axis). It may be provided with a chuck or a return vice, but may also be provided with a counter-tip system as shown in 29 at Fig. 4 .
  • the tailstock rod has clearance to prevent interaction with the swirl head due to the angle of inclination of the threads.
  • the pin 26 provided with a simple strawberry. It is a mobile unit in four X, Y, Z, and B axes that need not be described in detail since they belong to a known machine.
  • the spindle 26 and the recovery unit 32 are first brought into the positions of the Fig. 4 . Bar to be machined (not shown in Fig. 5 ) is advanced and its end provided by engagement in the tailstock 29. The threading of the screw is achieved by moving the pin 26 along the X axis. Then the pin 26 is disengaged.
  • the whirling head separated from the spindle is reintroduced into a magazine (not shown) by means of a tool change arm; after which, the spindle being equipped with a cutting tool, the properly threaded bar segment 27 is cut at the unit 28.
  • the milling of the screw head can be performed by a suitable tool mounted on the spindle motor shaft 26 during the same cycle of operations as that including the swirling. This operation can take place before or after the threading.
  • the complete process can be controlled flexibly and fully automatically by programming the existing axes.
  • the geometry of the swirl head makes it possible to machine a helix angle of the screw up to 28 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
EP06125304A 2006-12-04 2006-12-04 Wirbelkopf und seine Anwendung Withdrawn EP1930111A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06125304A EP1930111A1 (de) 2006-12-04 2006-12-04 Wirbelkopf und seine Anwendung
US11/998,205 US20080131224A1 (en) 2006-12-04 2007-11-29 Whirling head and its use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06125304A EP1930111A1 (de) 2006-12-04 2006-12-04 Wirbelkopf und seine Anwendung

Publications (1)

Publication Number Publication Date
EP1930111A1 true EP1930111A1 (de) 2008-06-11

Family

ID=37964919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06125304A Withdrawn EP1930111A1 (de) 2006-12-04 2006-12-04 Wirbelkopf und seine Anwendung

Country Status (2)

Country Link
US (1) US20080131224A1 (de)
EP (1) EP1930111A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3064297A1 (de) * 2015-03-03 2016-09-07 Tornos SA Ausrüstung mit abnehmbaren zubehörteil und gesamtausstattung für drehmaschine, und entsprechende cnc-drehmaschine

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG161135A1 (en) * 2008-11-03 2010-06-29 Dextra Asia Co Ltd Threading machine with coaxial peeling and threading means
JP5385675B2 (ja) * 2009-05-08 2014-01-08 株式会社森精機製作所 旋削加工用工作機械
JP5988872B2 (ja) * 2009-09-25 2016-09-07 ザ グリーソン ワークス 歯車の面取りおよび（または）バリ取りをする装置
US20120264528A1 (en) * 2009-12-25 2012-10-18 Ngk Spark Plug Co., Ltd. Screw manufacturing method, whirling cutter, and screw manufacturing machine
GB201001836D0 (en) * 2010-02-04 2010-03-24 Nat Oilwell Varco Lp Stator manufacturing method
CN102001027A (zh) * 2010-11-06 2011-04-06 黄山皖南机床有限公司 一种四轴四联动立式加工中心
DE102011112339B4 (de) * 2011-09-02 2016-01-21 Wohlenberg Werkzeugmaschinen GmbH Wirbelvorrichtung
DE102011082903A1 (de) * 2011-09-18 2013-03-21 Gildemeister Italiana S.P.A. Gewindewirbelvorrichtung und Drehmaschine umfassend eine Gewindewirbelvorrichtung
EP2790862A2 (de) * 2011-12-13 2014-10-22 The Gleason Works Zahnradfräsmaschine
DE102013003288A1 (de) * 2013-02-26 2014-08-28 Gleason-Pfauter Maschinenfabrik Gmbh Verfahren zur spanenden Erzeugung oder Bearbeitung einer Innenverzahnung, Bewegungsänderungseinrichtung und Werkzeugmaschine
CN103170665B (zh) * 2013-03-22 2015-09-02 湖北唯思凌科装备制造有限公司 一种数控螺杆铣床
CN103818169A (zh) * 2014-03-10 2014-05-28 陶冬波 五轴数控雕刻机摆动头
CN104097433A (zh) * 2014-07-03 2014-10-15 济南星辉数控机械科技有限公司 一种新型五轴数控非金属材料专用加工机床摆动机构
CN105364491B (zh) * 2015-12-27 2018-02-13 烟台前创软件科技有限公司 一种五轴数控加工中心
CN105478928B (zh) * 2015-12-28 2018-10-26 广州中大南沙科技创新产业园有限公司 左旋聚乳酸骨钉的成型加工方法
JP7016669B2 (ja) * 2016-12-22 2022-02-07 日本特殊陶業株式会社 スレッドワーリング加工用の切削工具、及び切削インサート
CN107526372B (zh) * 2017-08-25 2020-06-19 苏州玻色智能科技有限公司 五轴控制装置及曲面或弧面玻璃面板的检测设备
CH714283B1 (de) * 2017-12-18 2019-04-30 Willen Pcm Sa Wirbelvorrichtung.
EP3778079A4 (de) * 2018-03-30 2021-12-22 Citizen Watch Co., Ltd. Werkzeugmaschine
CN108237440B (zh) * 2018-03-30 2020-06-26 科德数控股份有限公司 一种卧式五轴铣车复合加工中心
JP7097220B2 (ja) * 2018-04-17 2022-07-07 株式会社ツガミ 工作機械
US11660677B2 (en) * 2018-05-30 2023-05-30 Amera-Seiki Direct, Llc Tooling assemblies for lathe machines, CNC threading lathes, and methods of milling threads in tubular workpieces
CN213033723U (zh) * 2020-08-17 2021-04-23 江苏晨光数控机床有限公司 一种数控旋风铣床
US20230041729A1 (en) * 2021-08-03 2023-02-09 HM Process Technology AG Whirling tool
CN113878150B (zh) * 2021-09-16 2024-05-17 山东雷德数控机械股份有限公司 一种环保型数控五轴四铣刀端面铣床
CN113894593A (zh) * 2021-11-05 2022-01-07 齐齐哈尔精工伟业机床有限公司 一种数控铣镗床分度工作转台

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DE2110574A1 (de) * 1971-03-05 1972-09-28 Herbert Schulz Radienfraesvorrichtung
DE2516775A1 (de) * 1975-04-16 1976-10-28 Leitz Ernst Gmbh Einrichtung zum gewindefraesen
US4125057A (en) * 1976-03-31 1978-11-14 Cox Kris E Planetary milling machine
EP0033373A1 (de) * 1980-01-31 1981-08-12 Heinrich Denzler Fräskopf
US4449432A (en) * 1981-09-21 1984-05-22 Curtis Screw Company, Inc. Cutoff device for automatic screw machine
JPH03142144A (ja) * 1989-10-26 1991-06-17 Sugino Mach Ltd オイルホール付工具取付ユニット
DE19929068A1 (de) * 1999-06-25 2000-12-28 Leistritz Ag Wirbelring
EP1287932A1 (de) * 2001-09-04 2003-03-05 Leistritz Produktionstechnik GmbH Wirbelring

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US5305525A (en) * 1990-08-24 1994-04-26 Thermwood Corporation Spindle assembly for machine tools and method of fabricating same
EP1027955B1 (de) * 1999-02-12 2004-04-28 INDEX-WERKE GMBH & CO. KG HAHN & TESSKY Werkzeugmaschine
US6877934B2 (en) * 2002-10-28 2005-04-12 Rem Sales, Inc. Milling head for thread whirling
JP4234514B2 (ja) * 2003-07-09 2009-03-04 株式会社森精機製作所 Ｎｃ旋盤

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Publication number Priority date Publication date Assignee Title
DE2110574A1 (de) * 1971-03-05 1972-09-28 Herbert Schulz Radienfraesvorrichtung
DE2516775A1 (de) * 1975-04-16 1976-10-28 Leitz Ernst Gmbh Einrichtung zum gewindefraesen
US4125057A (en) * 1976-03-31 1978-11-14 Cox Kris E Planetary milling machine
EP0033373A1 (de) * 1980-01-31 1981-08-12 Heinrich Denzler Fräskopf
US4449432A (en) * 1981-09-21 1984-05-22 Curtis Screw Company, Inc. Cutoff device for automatic screw machine
JPH03142144A (ja) * 1989-10-26 1991-06-17 Sugino Mach Ltd オイルホール付工具取付ユニット
DE19929068A1 (de) * 1999-06-25 2000-12-28 Leistritz Ag Wirbelring
EP1287932A1 (de) * 2001-09-04 2003-03-05 Leistritz Produktionstechnik GmbH Wirbelring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3064297A1 (de) * 2015-03-03 2016-09-07 Tornos SA Ausrüstung mit abnehmbaren zubehörteil und gesamtausstattung für drehmaschine, und entsprechende cnc-drehmaschine
CN105935885A (zh) * 2015-03-03 2016-09-14 托尔诺斯有限公司 加工车床的带可拆卸附件的设备和组件及数控加工车床
US10099293B2 (en) 2015-03-03 2018-10-16 Tornos Sa Equipment with a detachable accessory and assembly for a machining lathe, and machining lathe with digital control
CN105935885B (zh) * 2015-03-03 2020-10-09 托尔诺斯有限公司 加工车床的带可拆卸附件的设备和组件及数控加工车床

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